Carbon-doped BN nanosheets for metal-free photoredox catalysis

By Caijin Huang, Cheng Chen, Mingwen Zhang, Lihua Lin, X. Ye, Sen Lin, Markus Antonietti, Xinchen Wang. Nature Communications, 2015

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The generation of sustainable and stable semiconductors for solar energy conversion by photoredox catalysis, for example, light-induced water splitting and carbon dioxide reduction, is a key challenge of modern materials chemistry. Here we present a simple synthesis of a ternary semiconductor, boron carbon nitride, and show that it can catalyse hydrogen or oxygen evolution from water as well as carbon dioxide reduction under visible light illumination. The ternary B–C–N alloy features a delocalized two-dimensional electron system with sp2 carbon incorporated in the h-BN lattice where the bandgap can be adjusted by the amount of incorporated carbon to produce unique functions. Such sustainable photocatalysts made of lightweight elements facilitate the innovative construction of photoredox cascades to utilize solar energy for chemical conversion. Metal-free semiconductors with appropriate bandgaps create photocatalytic routes to water splitting and CO2reduction. Here the authors dope hexagonal boron nitride nanosheets with carbon via a simple method to synthesize a ternary B–C–N alloy capable of performing just this function.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/899ccf408561381bafc75bc27ea3d0f651d268f6